#import <GLKit/GLKit.h>


typedef enum {
  RWTVertexAttribPosition = 0,
    RWTVertexAttribColor,
    RWTVertexAttribTextCoord
} RWTVertexAttributes;

typedef struct {
    GLfloat Position[3];//顶点(x,y,z)
    GLfloat Color[4];//颜色（rgba）
    GLfloat TexCoord[2];//纹理坐标(x,y)
} RWTVertex;
